Crimping-machine.



F. H. STOLP.

CRIMPING MACHINE.

APPLIOATION FILED 1320.15, 1909.

1,002,334. Patented Sept. 5, 1911.

4 SHEETS-SHEET 1.

COLUIIRA WRAP" C0, WASHINGTON. D. 6.

V GRIMPING MACHINE. y APPLIOATION FILED Dno.15,'19o9.

1,002,334. Patented Sept. 5,1911vl 4 SHEETS-SHEET 2.

F. H. STOLP.

GRIMPING MACHINE.

APPLIOATION FILED DBO. 15, 1909.

1,002,334. Patented Sept. 5, 1911.

4 SHEETS-SHEET 3.

GRIMPING MACHINE.

APPLIGATION FILED 1320.15, 1909.

Patented Sept. 5, 1911.

4 SHEETS-SHEET 4.

mi) l .Ill

BIA PLANOURAPM Co.. WASHINGTON. D. C.

UNITED STATES PATENT OFFICE.

FRANK H. STOLP, OF ROME, NEW YORK, ASSIGNOR, BY MESNE ASSIGNMENTS, TO ROME- TURNEY RADIATOR COMPANY, OF ROME, NEW YORK, A CORPORATION 0F NEW YORK.

CRIMPINGr-MACHINE.

To all whom it may concern:

Be it known that I, FRANK H. STOLP, a citizen of the United States, residing at Rome, Oneida county, State of New York, have invented certain new and useful Improvements in Crimping-Machines, the following being a full, clear, and exact disclosure of the one form of my invention which I at present deem preferable.

For a detailed description of the present form of my invention, reference may be had to the following specification and to the accompanying drawings forming a part thereof, in which,

Figure l is an end elevation of my machine with the folder removed; Fig. 2 is a vertical central section thereof; Figs. 3 and 4 are sectional views of the pendulum arm; Figs. 5 and 6 are front views of the said arm; Fig. 7 is a detail view of the reciprocating die; Fig. 8 is a front view of the die and punch partly in section; Fig. 9 is a section on the line X X of Fig. 8; Fig. 1() is a section on the line Y Y of Fig. 8; Fig. 11 is a plan view of the folder from the under side; Fig. l2 is a side elevation of the folder; Figs. 13, 14, l5 and 16 are sections through the folder on the lines a, o, c and d respectively of Figs. 11 and 12; Fig. 17 is a view of the metal strip produced by the crimping operation; Fig. 18 is a detail of the cut off mechanism.

My invention relates to a machine for crimping thin metallic sheets and particularly sheets designed for use in the construction of a radiator, the said sheet being folded up at intervals and the respective folds punched through and enlarged to form tubular projections or bosses at definite distances along the sheet.

My machine as a whole contains three separate parts, one serving to fold over the edges of the sheet or strip, the next to, crimp and the third to automatically cut off given lengths of the crimped strip. It is important that the crimping be performed with extreme accuracy, particularly as regards the shape of the tubular projections, their spacing upon the strip and the cutting off of the strip in given lengths. Such accuracy of operation is attained by the machine herein shown.

Specification of Letters Patent.

Application filed December 15, 1909.

Patented Sept. 5, 1911. Serial No. 533,259.

The folder is located at the point where the strip enters the machine and consists of a bed plate placed face downward on the under side of a supporting extension from the frame of the machine and having a central former provided on each side with folding jaws which serve to turn over the edges of the entering metallic strip forming a sort of hem upon the longitudinal borders of the strip.

The crimper consists principally of a pendulum arm oscillating on a bearing at its upper end and provided with a central horizontal opening through which the strip passes. Below this opening is fixed on the arm a punch, and above the said opening a reciprocating die with a recess on the under side corresponding to the shape of the punch. An eccentric shaft passes through the said die and at each revolution thereof acts both to reciprocate the die and swing the arm. Stripping devices are provided on each side of the punch and also in the die. At each oscillation of the arm the strip is gripped as the arm starts from its rearmost position and is drawn forward by the arm movement, being also crimped during the said forward movement and released at the end thereof.

The cut-0H? mechanism receives the strip after it emerges from the crimper and at certain specified intervals acts to cut off given lengths of the strip.

Referring first to Fig. 17 there will be found illustrated therein the crimped strip which the machine is designed to produce. The strip is marked A and has its lateral edges folded over at al a2 as above described. At intervals the strip is, by the crimping operation, folded upward to form ridges B, the center portion of each ridge being slitf ted on top and expanded to form a short tubular projection somewhat elliptical in cross section.

The folder above referred to is shown in Figs. 11 to 1G inclusive and it comprises a bed plate C with beveled ends (as particularly appears in Fig. 12) by means of which it is mounted in a dovetailed groove on the under side of its supporting standard. At the center of this bed plate is the central former C1 having a somewhat T-shape form,

as appears in Fig. 11, the corners being beveled ofl on either side of the stem to form the T. It is also separated from the bed-plate a slight distance equal to the thickness of the strip to be crimped and supported by a transverse clamp C2. On either side of the former C1 are the folding jaws D which receive the edges of the strip A as it moves from right to left through the folder and under the central former, as indicated by the arrow in Fig. 11, and act on the said edges by their beveled surfaces at the right to gradually turn them over and finally to press them down into close contact with the main portion of the strip as appears at a1 a2 in Fig. 17. The strip on entering the folder passes over the former C1, as indicated at the section in Fig. 13 taken at the point a of Figs. 11 and 12. At the point Z) of said figures the strip first encounters the bevel of the jaws D, as appears in section Fig. 14 taken at that point. At the point e of said figures the edges have been partly turned down around the beveled edges of C1 as appears in Fig. 15, while at the point d of said figures they have been completely folded in against the body of the strip, as appears in Fig. 16. The mounting of the folder upon the machine is shown in Fig. 2, where it is indicated as secured by its dovetailed edges to the under side of a horizontal projection C2 extending upwardly from the main frame of the machine.

Taking up next the description of the crimper, attention is calledto Figs. 2, 3 and 4, which best illustrate the pendulum arm which is a prominent feature of the mechanism. This arm E is journaled at its upper end on a stationary shaft e and hangs down therefrom, being drawn toward the right by a spring E1.

E2 is an arched opening or window in the arm through which the strip A is drawn after leaving the folder. Below this window and bolted fast to arm- E is the punch block F with an upwardly projecting blade f oval shaped in cross section, to correspond to the tubular enlargement B found on the strip A, and has a sharp curved edge at the top to eut through the strip. The bolt F1 secures the punch block F to the arm A. The punch block F (see Figs. 5, 6, 8) is embraced on each side by the slide bars G2, G2 projecting upward from a slide block G, seated on spring H that is seated in turn at the lower end of arm E. Each slide bar G2 carries at its upper end a crimping blade g held in a clamp g1 set in the upper end of G2 and there secured by a screw g3 (see Figs. 8 and 10). These crimping blades g serve to form the fold or ridge B in the strip A, the center of which ridge is slitted and eX- panded by blade The slide plate G is covered by a cap-plate G1 held by the said bolt F1 which secures the punch-block F. Spring H is a heavy spring arranged to press on plate G, being seated on a plate H1 (see Figs. 2 and 4) which is screwed to the lower extremity of arln E and the lower edge of cap-plate G1. On either side of the bars G2 are guide-rods G2' projecting upward from G and serving to guide the sidestripper K, which, (see Figs. 5, G, 7, 8, 9, 10) is a rectangular plate with a central slot to receive the punch-blade and folder blades g g and with holes at each end to fit over the extremities of guide rods G2. The side stripper K is upheld by springs K1 which surround rods G3 and are weaker than spring H so as to yield and permit the stripper to descend and abut against the shoulders on rods G3, when a continued downward pressure on stripper K will depress plate G against the force of the stronger spring H together with the crimping blades g carried thereby.

The die consists of a block P made in two halves p1 and p2 secured together by screw 722 with the eccentric shaft p1 between them (see Fig. 7). On the back of part p1 is a projection which slides in and is guided by a recess a3 in arm E. The lower end of die P is recessed to embrace the punch-blade f (see Figs. 5, 6 and 8) and at the sides of this recess the parts p1 and p2 are slightly separated to receive a very thin plate K2 which acts as the top stripper, being held at each end by pins le, 7c on arm E. The blades g, g are also received in the side recesses formed by the separated parts. Obviously the revolution of the eccentric shaft P1 will, by virtue of its bearing in the die block P reciprocate that block up and down on arm E, while the arm itself is moved by the same agency against the tension of the spring E1. The cut-off aforesaid receives the strip A (see Fig.2) after it emerges from the crimper. It comprises a stationary cutterblade S positioned beneath the strip, and a reciprocating cutter-blade S1 above the strip, the latter being upheld by a spring S2 and guided by a pin S2 working in a slot in the frame. The upper blade S1 projects above the frame to form an anvil S1, which is struck at predetermined intervals by a hammer T, on the end of rocker-arm T1 which is oscillated by a connecting rod T2 journaled at its lower end on the aforesaid eccentric shaft P1. The hammer T revolves on a shaft T6 (see Fig. 18) journaled in thel end of rocker-arm T1 and carrying a ratchet wheel T5 which, at each 11p-stroke of the arm T1 is rotated one tooth by the pawl T* (see Fig. 2) with which it engages. As

shaft TG rotates, the hammer T is gradually revolved until it comes into line with the anvil S4, when the down-stroke of arm T1 will cause it to strike the anvil S1 and operate cutter S1 to sever the strip A at the point which, at that instant, lies between the cutter-blades. The shaft TG has an adjusted degree of spring-friction in its bearings in arm T1 by virtue of a disk t on the hammer hub (see Fig. 18) and a spring t2 compressed against it by drawing up the nut on shaft Tj so that it has no back lash. The machine has fast and loose pulleys W1, N2 by the revolution of and a belt shifter W, also a hand wheel W3.

The operation will be readily understood;

. it is as follows: The arm E is swung back to the rear end of its stroke, as appears 1n Figs. 3 and 6, and to the eccentric shaft as indicated by arrow 1. At this point the strip A is gripped between die-block I) and stripper K. The die then descends as the arm swings forward, the ridge or fold B in the strip being produced by the blades g, g entering the side recesses in the underside of the die, while the punch-blade f at the same time slits the center of the strip by its curved cutting edge; then a further downward movement of the die forces the slit edges down on and around the enlarged oval-formed portion of the punch-blade f (the side folds being held, during this part of the operation in the side recesses of the die) and thereby produces the oval tubular projections shown in Fig. 17. This brings the die to its lowest position, shown in Figs. 4 and 7, its forward stroke being half completed. The die then begins to rise, the spring H lifts plate G, (together with blades g, g, rods G3, Gr and stripper plate K) and strips the tubular part ott' of punch blade f. This is followed by a further lift of stripper-plate K by the springs K1, which strips the side folds oif the blades g, g, while as the die rises further the stripper plate K2 eXpels the side folds from the recesses in the die. This completes the forward stroke of the arm E, which has drawn forward and crimped a given length of the strip and is now free of it. By the next half revolution of the eccentric shaft the tension on spring El is diminished, and by reason of the recoil of the spring the arm will be returned to the starting point of the next crimping operation.

It will be understood that the apparatus above described may be embodied in forms different from those specifically illustrated. herein without departing from the spirit of my invention.

I also call particular attention to the fact that the oscillation of the pendulum-arm provides for the feeding of the metal simultaneously with the crimping action, and I believe that it is novel to thus mount the two members which act upon the metal so that they may reciprocate jointly, or move to and fro together for 'the purpose of feeding the metal, and simultaneously therewith have the required reciprocating action of one with respect to the other.

I also intend my machine to be used in its fundamental character with any suitable form of metal-working elements such as a simple punch and die in place of the i particular punching and crimping elements herein shown.

That I claim as new and desire to secure by Letters Patent is :4

l. In a lmetal working machine, a support, a die and punch in reciprocating relation to each other on said support and jointly reciprocating with relation to the metal to be crimped, means for oscillating said supportin the arc of a circle, and means cooperating with said oscillating means for producing the said reciprocating action of said die and punch.

2. In a metal-working machine, the combination with a pendulum-arm, of a. die and punch both supported by and oscillating with the said arm, one reciprocating upon the said arm with relation to the other, means for oscillating vthe said arm, and means for and simultaneously reciprocating the said reciprocating element thereon.

3. In a metal-working machine, the combination with a pendulum-arm, of a punch and die both supported by said arm and one reciprocating with respect to the other, an eccentric shaft for the arm and having a link for engaging the reciprocating member and serving to simultaneously reciprocate said member and oscillate the arm.

4. In a metal-working machine, the combination with an oscillating arm, of a punch and die both supported by said arm and one reciprocating with respect to the other, an eccentric shaft for said arm and provided with a link for engaging the reciprocating member and serving both to reciprocate it and oscillate the arm, and a spring tending to move the arm in one direction.

5. In a metal-working machine, a support, a die and punch in reciprocating relation to each other on said support to crimp the metal and jointly moving in relation with the metal to be crimped to feed the same, and means for oscillating said support combined with means for producing said reciprocating action.

6. In a metal-working machine, the combination with an oscillating support and a punch and die mounted for reciprocating movements thereon, of means for independently reciprocating one with respect to the other to crimp the metal, and means for simultaneously moving both the die and punch joint-ly to feed the metal.

7. In a metal-working machine, the combination with a punch and die, and means for operating the same at definite intervals,

of a cut-ofi:l mechanism for severing the metal at longer intervals, and means actuated by said punch and die operating means for controlling the operation of said cut off mechanism.

8. In a metal-working machine, the combination with a pendulum-arm, of a punch fixed thereon, a die mounted on the arm and reciprocating with respect to t-he punch, to crimp the metal, and a spring-mounted stripper for freeing the metal after the crimping operation.

9. In a metal-working machine, the combination with a punch and die one reciprocating with respect to the other, of a folderblade adapted to enter a recess in the said die and means including the punch and die for advancing the metal with respect to the said die and the said punch and folder-blade.

10. In a metal working machine, the combination with a die, of a blade cooperating with said die to fold the metal, a punch also cooperating with said die and provided with a cutting edge and a shaping surface, and means for reciprocating the die with relation to said blade and said punch.

11. In a metal-working machine,the combination with mechanism for forming a fold or crim in the metal, of mechanism cooperating tierewith for slitting and expanding the fold or crimp so formed.

12. In a metal-working machine, the combination with a folder and die for forming a crimp in the metal, means for slitting and expanding the fold or crimp thus formed, and means including said die for feeding the metal to be acted upon.

18. In a metal-working machine,the combination of a reciprocating die, a cutting and expanding punch, folding blades cooperating therewith, strippers, and means including said die for feeding the work.

14. In a metal-crimping machine, the combination with a cutting and expanding punch, crimping blades, a die having recesses for the said punch and blades respectively means acting upon said punch and blades for simultaneously cutting the metal and forming the folds or crimps therein, and independent means for acting on said punch to subsequently expand the fold or crimp thus formed.

15. In a metal-crimping machine, the combination with a cutting and shaping punch, of a stripper inclosing the cutting portion of the punch, a spring for supporting the stripper during the cutting operation, and a second stronger spring for supporting it during the shaping operation.

16. In a metal-working machine, the combination with a cutting and shaping punch, of folding blades on either side thereof, a stripper inclosing said punch and blades, a

spring for supporting the stripper during the cutting and folding operation, a stronger spring for supporting both the stripper and the said blades during the shaping operation, and a die having recesses to receive the said punch and the said blades respectively.

17. In a metal-working machine, the combination with a cutting and shaping punch, of folding blades on either side thereof, a spring for supporting the said blades, a spring-supported stripper inclosing the said punch and blades, a die having recesses to receive the punch and the blade respectively, and a stripper in the said die.

18. In a metal-working machine, the combination with a pendulum-arm, of a punch fixed thereon, a die reciprocating thereon, spring-supported folding blades on the said arm, the said punch and the said blades being adapted to enter recesses in the die, a springsupported stripper inclosing the punch and the blades, a stripper in the die, and an eccentric shaft engaging the said die and serving to both reciprocate it upon the arm and to oscillate the arm.

19. In a metal-working machine, the combination with a punch and die, means for reciprocating with respect to the other, of feeding mechanism, and cut-off mechanism comprising cutters, a hammer for operating the cutters, and means controlled by said punch and die for bringing the hammer at definite intervals into alinement with the cutters to operate the same.

20. A cut-olf mechanism for metal working machines comprising cutters, a hammer for operating said cutters, a reciprocating support for said hammer, and means for rotatably mounting the hammer in said support.

21. A cut-O' mechanism for metal working machines, comprising cutters, a reciprocating and revolving hammer, and a ratchet operated by the reciprocation of the hammer to rotate the same, whereby the hammer is brought at deinite intervals to a position to act upon. the cutters.

22. In a metal-crimping machine, the combination with a pendulum-arm, of a die and punch mounted for reciprocating movements thereon, one movable with respectto the other, and a single eccentric shaft having a link engaging the movable member to simultaneously reciprocate it with respect to the stationary member and oscillate the arm to bring it into a new operative position with respect to the metal to be crimped.

23. In a metalcrimping machine, the combination with a pendulum-arm, of a punch secured thereto, a spring-mounted and reciprocated plate upon the said arm, extensions from said plate embracing and guided by the said punch, crimping blades upon the said extensions, a stripper embracing the said punch and the said plate, In Witness Whereofhave hereunto set my springs and guides for mounting the striphand, before two subscribing Witnesses, this per on the said plate, a reciprocating die 7th day of December, 1909.

containing recesses for the said punch and FRANK H. STOLP. the said blades respectively, a stripper in the Witnesses:

said die, and means for reciprocating the die C. H. SIMON,

and oscillating the pendulum-arm. J, G. LINK.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

